Analog Devices Inc./Maxim Integrated MAXM15466AMB+T

Overview

The MAXM15466AMB+T from Maxim Integrated is a fixed 5V, 300mA synchronous step-down DC-DC power module with integrated controller, MOSFETs, compensation, and inductor. It operates from 4.5V to 42V input, delivers ±1.5% feedback accuracy, features an open-drain RESET output, and employs peak-current-mode control for stable regulation in space-constrained industrial sensor and 4–20mA loop applications.

For engineers reviewing the MAXM15466AMB+T datasheet, MAXM15466AMB+T pinout, MAXM15466AMB+T application, or MAXM15466AMB+T equivalent, key selection criteria include its 5V fixed output, 3.75ms soft-start, hiccup overcurrent protection, -40°C to +125°C ambient operation, and uSLIC™ package compatibility with high-density PCB layouts.

Technical Context

The MAXM15466AMB+T implements peak-current-mode control with internal compensation, enabling stable regulation without external loop components. Its fixed 5V output is set by internal feedback resistors (V_FB-REG = 4.93–5.18V), and it supports both PWM and PFM modes via the MODE pin to optimize light-load efficiency.

It integrates a 5V LDO (VCC) with 4.75–5.25V output and 13–50mA current limit, provides prebias startup capability, and uses hiccup-mode overcurrent protection with 120ms timeout-ensuring robust fault recovery in battery-powered and HVAC systems.

Key Specifications

Pinout & Package

The MAXM15466AMB+T is housed in a 10-pin, 2.6mm × 3mm × 1.5mm uSLIC™ package (package code M102A3+2), optimized for thermal performance (θ_JA = 41.56°C/W) and high-density layout with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output buck module applications.

Compared with MAXM15465AMB+T and TPSM84205RUQR, the MAXM15466AMB+T provides optimal trade-offs for 5V-only applications: guaranteed 5V accuracy without resistor networks, smallest footprint (2.6×3mm), lowest component count, and full qualification for industrial temperature and EMI requirements.

Availability

MAXM15466AMB+T is available at Aetrix Electronics and suitable for industrial sensors and encoders, 4–20mA current-loop powered sensors, and USB Type-C powered loads requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAXM15466AMB+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.

The Himalaya uSLIC™ power module product line targets space-constrained, thermally demanding applications requiring high reliability, simplified design, and fast time-to-market - especially in industrial automation, building controls, and portable instrumentation.

FAQ

What is the output voltage tolerance of the MAXM15466AMB+T?

The MAXM15466AMB+T delivers a fixed 5.00V output with ±1.5% regulation accuracy over line, load, and temperature (-40°C to +125°C ambient). This is achieved via internal feedback resistors calibrated to 4.93–5.07V (rising) and 4.93–5.18V (unconnected MODE), eliminating external resistor drift and ensuring consistent 5V rail performance in industrial environments.

Does the MAXM15466AMB+T require external compensation components?

No, the MAXM15466AMB+T is fully internally compensated. Its peak-current-mode control architecture integrates all necessary compensation components, allowing direct use with only input and output ceramic capacitors (1µF and 10µF respectively). This eliminates loop stability analysis and saves PCB area versus controller-based solutions.

Can the MAXM15466AMB+T operate with a prebiased output?

Yes, the MAXM15466AMB+T supports prebias startup. When the output is precharged (e.g., by another supply), the device safely transitions into regulation without forcing reverse current or causing output overshoot - verified in datasheet waveforms (toc57, toc58, toc63, toc64) for 2V and 2.5V prebias conditions at 5V output.

What is the thermal performance of the MAXM15466AMB+T in a standard PCB layout?

On a four-layer evaluation board with natural convection, the MAXM15466AMB+T exhibits a junction-to-ambient thermal resistance (θ_JA) of 41.56°C/W. At 300mA load and 24V input, typical power dissipation is ~150mW, resulting in ~6.2°C junction rise above ambient - well within the +150°C max junction limit and supporting continuous operation at full load up to +125°C ambient.

How does the RESET pin function on the MAXM15466AMB+T?

The RESET pin on the MAXM15466AMB+T is an open-drain power-good indicator that asserts low when the FB voltage drops below 92% of its nominal value (e.g., <4.6V for 5V output), and returns to high-impedance 1.9ms after FB rises above 95.5% (e.g., >4.78V). An external pull-up resistor is required to interface with host microcontrollers or FPGA reset inputs.